Furnace



- maman Sept. 21 1926.

M. J. OWENS FURNACE Filed sept. 2o, 1924 2 sheetsfsvheet- 1 R D .T N EV. N

sept; 21', 1926. 1,600,484

l v M. J. OWENS FURNACE A Filed sept. 2o, 1924 1 2 sheets-sheet 2` HISHTTRNEY 16 takes A maintained by meais of a stack or chimney Patenteasept. 2i, 192s.

uNiTlsz-DV Astares Param oFFica,

MICHAEL OWENS, DECEASED, LATE OF TOLEDO, OI-IIO; :BY HAZEL O. BEESCH,JAMES C. BLAIR, .AND JOHN H.. MCNERNEY,

ADMINSTRATORS, OF TOLEDO, OHIO, AS-

SIGNORS THE OWENS BOTTLE COMPANY, F TOLEDO, OHIO, A CORPORATION 0F OHIO.

` rUBNAcE The invention is herein shown in connection with a glassmeltingtank furnace. In such furnaces, it is customary to admit fuel-gas and atmospheric air in suitable -proportions into the furnace,where combustion place. A circulation of the air is through which theburnt gases or products of combustion are carried oif. In such anarrangement, the 'draft varies considerably,

, owing to dail variations in the temperature of the outsi e air andalso to changes in weather conditions. As the'outside temperaturelowers, the draft through the stack correspondingly increases, so thatthe gases are s drawn through and beyond the' melting lchamber before'complete combustion has taken place. On the other hand, a rise intemperature may reduce the draft to such an extieritthatv the amount ofair supplied tothe draft by dampers in the smoke stack, but

it is. ,practically impossible to get the average workman to properlyregulate such dampers This difiiculty is increased by the -fact thatthere are different shifts of work;

40. men, usually three, every twenty-four hours, so that the regulationcannot be left in charge of any one person.

1n accordance with the present invention, there is provided within theair circulating system, a draft blower preferably `between 'the furnaceand the stack. This blower is run continuously at a constant speed, sothat a substantially constant draft is maintained independently ofatmospheric conditions, thereby securing uniform combustion and heatconditions within the furnace. This blower may be an induced draftblower operable to draw the air from the furnace and force it toward thesmoke stack. In its preferred form, the invention also includes a forceddraft blower in the air circulating system, by which air is forced-intothe furnace, thereby assisting in` maintaining constant and uniformconditions of combustion within the furnace.

A further feature of the invention relates to the arrangement wherebythe air for combustion is drawn from the bridge wall or narrow confinedspace usually provided between the melting tank and refining tank of aglass furnace. 'This further contributes to the general result ofmaintaining a sub- Figure 2 is a sectional view of the revers? valve.

igure `3 is a detail View of a throttle valv Figure 4 is a Viewsimilarto Figure 1,

but showing a modification in which a recuperator is used.

Figure 5 is a fragmentary sectional view .at the line V-V on Figure 4.

The furnace comprises a melting tank 1,0 and a refining tank 11separated by a bridge wall 12, the latter providing a narrow space 13between the two tanks or compartments. A roof 14 extends over -vtheentire furnace .and kprovides a confined space 15 over the ously at aconstant speed. 'forces the air through a i duit to the checker chamber27 of a regenerative construction. lThe air 1s heated 1n ltsl passage.`through the checkerwork in the chamv i ,beg` v27 and then passes throughconduits 28 l and`29 to the interior of the 'furnace where it is mixedwith the fuel gas and burns within the space 15. The burnt gases passfrom the furnace through conduits 30 and 31 to and through the checkerchamber 32. The gases in the checkerwork therein and then pass throughthe conduit 26 and past the reversing valve 24 to an exhaust conduit 33leading to an induced draft blower 34. This blower is run continuouslyby an electric motor 35 at a constant speed and in a direction to drawthe burnt gasesthrough the exhaust conduit 33 and force them upwardlythrough the smoke stack or chimney 36. The reversing valve 24 isperiodically reversed at regular intervals, thereby reversing thedirection of flow through the furnace and through the checker chambers27 and 32. Each reversal causes the fuel air to pass through the checkerchamber which has been,

heated by the spent gases which have been passing through such chamberjustprior to such reversal.

By drawing the air from the passage 13 in the bridge wall, which airisquite hot and is of much more nearly constant temperature than theoutside air, an'economy of fuel is effected. Also, a more nearlycons/tant temperature is maintained. A circulation of air through thespace 13 is also maintained, which materially assists in preventingoverheating of the bridge wall.

Under some conditions, satisfactory results maybe' obtained by omittingeither the i induced draft blower 34 or the forced draft blower 18. 4Theuse of both blowers, however, lin combination, gives more reliable anduniform results under widely varying conditions.

Fi ures 4'and 5 illustrate my invention as applied to a glass furnacehaving a recuperator 40, .or recuperators on one or both sides of theglass furnace. The air passing through the forced draft blower 18 isforced through a pipe 41 into a chamber 42 within the recupera or 40.From thence the air is conducted through passageways 43 into the mainfurnace where combustion takes place.

furnace, which may be of usual4 passing through this chamber, heat Thegases of'combustion pass from the furnace through a passageway throughthe recuperator to a conduit 45 lead- .infA to the induced draft blower34. The

44 back into and channel, whereby fresh air enters directly from theatmosphere into said channel; is

heated therein and is drawn from thence into the circulating system.

' 2. A furnace comprising a melting chamber and a refining chamberseparated by` a bridge wall havingl an air space or channel therein, andpipes leading from said channel and communicating with the interior ofthe furnace for supplying air for combustion.

3. A furnace comprising a melting chamber and a refining chamberseparated by a bridge wall having an air space or channel therein, ablower, a pipe leading from said channel to the blower, and meansproviding a passageway leading from the blower to the interior of thefurnace. i 4. The combination of a furnace tank, a regenerative furnacecomprising checker chambers on opposite sides of the tank andcommunicating with. the tank, an air circulating system comprising achannel formed in the tank walls and opening directly into theatmosphere, conduits leading from said Channel to said checker chambers,a revers- King valve in said system by which the airis directedalternatively to said chambers,

and a forced draft blower located in said air system between said valveand said channel.

5. The combination of a furnace tank comprising a melting chamber and arefining chamber separated by a bridge wall having an air space orchannel therein, a regenerative. furnace, a conduit leading from saidchannel to the regenerative furnace for conducting heated air to saidfurnace, and means for conducting the air from the said furnace to theinterior of said tank.

6. The combination of a furnace tank comprising a melting chamber and arefining chamber separated by a bridge wall having an air space orchannel therein, a regenerative furnace, a conduit leading from saidchannel to the regenerative furnace, a blower in said conduit, and meansproviding a passageway leading from the regenerative furnace to themelting'clliamber.4

7. The combination of a furnace anda circulating system through whichair for combustion is circulated,'said system comprising' a conduitleading from a source of fresh air suplly 'and communicating with theinterior of t e furnace, a forced draft blower located in said conduitand operable to draw fresh air therethrough and force it into the fur--nace, a conduit leading from the furnace for carrying off the spentgases of-combustion, a chimney with which said last mentioned 10 conduitcommunicates, and an induced draft blower located Within ysaid lastmentioned conduit and-operable to draw the gases from the furnace andforce them into the chimand State of Ohio,'this 13th day of'Septem-.

ber, 1924.'

HZEL O.BEESCH, JAMES C. BLAIR,

i vJOHN H. MCNERNEY, Administrators of the Estate of Michael J.

Owens, De/ceased.

Y v A v Signed at Toledo, in the county of Lucas 15

